The cost formula for the maintenance department of Rainbow Ltd. is $19.000 per month plus $7.90 per machine hour used by the production department Required: a. Calculate the maintenance cost that would be budgeted for a month in which 6.500 machine hours are planned to be used. Maintenance on b. Prepare an appropriate performance report for the maintenance department assuming that 7,070 machine hours were actually used in the month of May and that the total maintenance cost incurred was $68,920. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (l.e., zero variance).) Original Budget (6.500 MH Flexed Budget (7.070 MH) Actual Cost Variance Total maintenance cost